The formula for stock value is ((#VMW x 0.5 x $142.50) + (#VMW x 0.5 x $AVGO x 0.252)). Assuming 50/50 split for stock and cash value payout.
It's not #VMW shares x 0.252 x $AVGO. 50% of your VMW stock payout will be in cash @ $142.50 and will not be converted to AVGO stock (with current assumptions).